Heats of adsorption for C4, C5 and C6 hydrocarbons on cobalt oxide determined by gas chromatography

Abstract

The heats of adsorption and the relative adsorption constants for C₄, C₅ and C₆ hydrocarbons were determined on cobalt oxide by means of gas/solid chromatography. The values are discussed in terms of electronic and steric effects. The values for C₄ and C₅ olefins depend mostly on electronic effects, while those for C₆ olefins are influenced seriously by steric effects. The values indicate a π-complex involving no back donation for the adsorbed olefin. The adsorbed state of the olefin seems to depend on the surface state of the oxide.